One and three quarters is a way to express a quantity that is one whole unit plus three-quarters of another unit. In numerical form, it is written as 1.75 or as a fraction, it can be represented as \frac74 . This concept is often used in measurements, such as in cooking or construction, where precise quantities are important. In everyday life, you might encounter one and three quarters when measuring ingredients, like needing 1.75 cups of flour for a recipe. It can also apply to time, such as one hour and 45 minutes, which is another way to express one and three quarters of an hour.